package avaliacao;

import avaliacao.Handler.HandlerInterface;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Controller extends HttpServlet{

    /** Redireciona para a página correta */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException{

        response.setContentType("text/html;charset=utf-8");

        String jspURL = null;
        String pageHandler = request.getParameter("pageHandler"); //recebe qual a página desejada
        pageHandler = "avaliacao.Handler." + pageHandler + "Handler";

        try{
            HandlerInterface handler = (HandlerInterface)Class.forName(pageHandler).newInstance();
            jspURL = handler.process(response, request);
            getServletContext().getRequestDispatcher(jspURL).forward(request, response);
        }
        catch(Exception e){
            e.printStackTrace();
            Logger.getLogger(Controller.class.getName()).log
                        (Level.SEVERE, "[CONTROLLER] Excessão: " + e.getMessage());
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
